My B rider sons 06 had something come apart in the trans. Untill I fix it I would like to put his moded suspension on my 07for him to race. I know that Yamaha increased the length of the rear shock by 1.5mm for 07. Will this cause a handling problem? Am I better off leaving the 07 shock on the bike? This is an improtant series for him. Any advise would help. Thanks.